Institute Newton C. Braga

Circuit Bench

555 testing generator (CB21341E)
Found in Electronics Now, this circuit generates signals for testing like a signal injector. The...
Common Telephones Intercom (CB17264E)
This circuit aims to take advantage of two old telephone sets in an efficient domestic intercom...
Metronome (CB10607E)
We found this circuit in a Radio & Electronics Constructor of November 1975. The magazine no...